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Updated: May 2, 2026

Remote Magnetic Navigation for Accurate, Real-time Catheter Positioning and Ablation in Cardiac Electrophysiology Procedures
Published on: April 21, 2013
What is behind radiofrequency delivery at the cavo-tricuspid isthmus?
David Filgueiras-Rama1, Martín Arceluz1, Sergio Castrejón1
1Robotic Cardiac Electrophysiology and Arrhythmia Unit, Hospital Universitario La Paz, Madrid, Spain.
Abstract:
Catheter-based ablation of isthmus-dependent common atrial flutter results in very high success rates and almost no complications. However, bidirectional conduction block through the isthmus may be challenging in a small percentage of patients regarding the use of high power and high temperature settings during radiofrequency delivery. Anatomical and physiological circumstances may be the reason for such difficulties to achieve bidirectional block at the cavo-tricuspid isthmus. However, in the present case we show edema formation after multiple shots of radiofrequency delivery at the cavo-tricuspid isthmus, which complicates the achievement of bidirectional conduction block.
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